web: show the speed a port is set to, not always auto

The speed selector on the Ports tab was filled with its options and never
given a value, so it read "auto" on every load whatever the port was set
to. Forcing a port to 1G and reloading showed "auto" in the selector
beside a link badge reading 1G.

The advertisement bits ports.json already reports say what the port is
set to: phy_set_speed() writes the same three registers the JSON reads
back, and every forced speed leaves exactly one of the six bits standing
while auto leaves the lot. Map those to the selector, and leave it alone
while it has focus, as the MTU field does.

Values with no entry in the table, such as the 100M setting that
advertises both duplex modes, leave the selector untouched rather than
claim a setting the list cannot express.

html/app.js

@@ -723,6 +723,7 @@ tabHooks.dash={
 var SPEEDS=[["auto","c_auto"],["2g5","2.5G"],["1g","1G"],["100m full","100M full"],
   ["100m half","100M half"],["10m full","10M full"],["10m half","10M half"]];
 var SFPRATES=[["auto","c_auto"],["10g","10G"],["2g5","2.5G"],["1g","1G"],["100m","100M"]];
+var ADVSEL={63:"auto",31:"auto",32:"2g5",16:"1g",8:"100m full",4:"100m half",2:"10m full",1:"10m half"};
 function speedLabel(s){
   if(s==="c_auto")return t("c_auto");
   return s.replace(" full"," "+t("c_full")).replace(" half"," "+t("c_half"));
@@ -785,6 +786,8 @@ function portsStatus(){
   S.ports.forEach(function(p){
     var i=p.portNum-1,el=$("plink"+i);
     if(el)el.innerHTML=linkBadge(p);
+    var sel=$("pspd"+i),v=p.isSFP?0:ADVSEL[parseInt(p.adv,2)];
+    if(sel&&v&&document.activeElement!==sel)sel.value=v;
   });
 }
 function applyPort(i){